First one I think is Chinese, usually marketed in this country as 'Royal Crest'. These are quite cleverly done, with interesting internal bubble effects, although the quality control may leave something to be desired - you have to look around for ones which you think are a good shape, with few 'extra' bubbles :roll:

Second - don't know :? You could be right! Not my area :shock:

Third - could be Chinese again, or it could be Bohemian, or maybe even Indian, from Firozabad. This site is interesting http://verredart.atspace.com/ if you have time to wait for all the images to download ! :shock:

Fourth one - very nice! Not sure who made it; could be one of several makers; but I like it. A picture of the base might help.